Question

qual e o resultado das perguntas? preciso delas com conta

a ) ( -2 ) - ( -4 ) - ( +7 ) - ( -2 ) + ( -12 ) =

b ) ( +2 ) + ( -6 ) - ( +5 ) + ( +2 ) =

c ) ( -5 ) - ( -8 ) + ( -7 ) - ( -9 ) + ( -3 ) =

d ) ( -2 ) - ( -4 ) - ( +7 ) - ( -2 ) + ( -12 ) =​

Answer 1

Resposta:

A) (-2)-(-4)-(+7)-(-2)+(-12)=

2-(+7)-(-2) +(-12)=

-5-(-2)+(-12)=

-3+(-12)=

-15

B) (+2)+(-6)-(+5)+(+2)=

-4-(+5)+(+2)=

-9+(+2)=

-7

C) (-5)-(-8)+(-7)-(-9)+(-3)=

3+(-7)-(-9)+(-3)=

-4-(-9)+(-3)=

5 +(-3)=

2

D) (-2)-(-4)-(+7)-(-2)+(-12)=

2-(+7)-(-2)+(-12)=

-5-(-2)+(-12)=

-3 +(-12)=

-15